NY Bootes: An Active Deep and Low-mass-ratio Contact Binary with a Cool Companion in a Hierarchical Triple System | |
Meng FB(孟芳斌)2,3,4; Zhu LY(朱俐颖)2,3,4; Qian SB(钱声帮)2,3,4; Liu NP(刘念平)2,4; Li LJ(李临甲)2,4; Matekov, Azizbek1,3,4 | |
刊名 | The Astrophysical Journal |
2023-08-28 | |
卷号 | 954期号:2 |
ISSN号 | 0004-637X |
DOI | 10.3847/1538-4357/ace8fe |
产权排序 | 第1完成单位 |
英文摘要 | The first detailed photometric and spectroscopic study of G-type short-period binary NY Boo is presented. The radial velocity curve was obtained by the cross-correlation function (CCF) method based on LAMOST and SDSS spectra, which derived its mass ratio as q = 0.139(1/7.2). The CCF profiles of the SDSS spectra clearly show the existence of a cool third component, which is supported by the results of the orbital period investigation. The period study based on the O-C analysis indicates that besides a long-term decrease, the orbital period has a periodic oscillation due to the light-travel time effect caused by a third body. When the third light contribution is consistent with the CCF results, the orbit of the third body and the inner pair are non-coplanar with m 3 = 0.31 M ⊙. Combining with the TESS light curves, it is found that the target is a deep and low-mass-ratio contact binary (DLMRCB) with a fill-out factor of f = 73%. The notable asymmetry in light curves was detected and explained by the spot model very well. The spectroscopic profiles, the cyclic variation in the O-C diagram, and the radial velocity curve and light-curve solutions all suggest that NY Boo is a hierarchical triple system with a cool tertiary component orbiting around an active DLMRCB. With the orbital period shrinking, the binary may eventually merge. The period of NY Boo decreases faster than other shrinking DLMRCB, together with active inner pair and non-coplanar tertiary component, making NY Boo an important target for studying the late evolution of binaries. |
学科主题 | 天文学 ; 恒星与银河系 ; 恒星形成与演化 |
语种 | 英语 |
出版者 | The American Astronomical Society |
WOS记录号 | IOP:APJ_954_2_111 |
内容类型 | 期刊论文 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/26203] |
专题 | 云南天文台_双星与变星研究组 |
通讯作者 | Zhu LY(朱俐颖) |
作者单位 | 1.Ulugh Beg Astronomical Institute, Uzbekistan Academy of Sciences, 33 Astronomicheskaya str., Tashkent, 100052, Uzbekistan 2.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 650216, Kunming, People's Republic of China 3.University of Chinese Academy of Sciences, No.1 Yanqihu East Rd, Huairou District, 101408, Beijing, People’s Republic of China 4.Yunnan Observatories, Chinese Academy of Sciences (CAS), 650216, Kunming, People's Republic of China; zhuly@ynao.ac.cn |
推荐引用方式 GB/T 7714 | Meng FB,Zhu LY,Qian SB,et al. NY Bootes: An Active Deep and Low-mass-ratio Contact Binary with a Cool Companion in a Hierarchical Triple System[J]. The Astrophysical Journal,2023,954(2). |
APA | Meng FB,Zhu LY,Qian SB,Liu NP,Li LJ,&Matekov, Azizbek.(2023).NY Bootes: An Active Deep and Low-mass-ratio Contact Binary with a Cool Companion in a Hierarchical Triple System.The Astrophysical Journal,954(2). |
MLA | Meng FB,et al."NY Bootes: An Active Deep and Low-mass-ratio Contact Binary with a Cool Companion in a Hierarchical Triple System".The Astrophysical Journal 954.2(2023). |
个性服务 |
查看访问统计 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论